package chapter03.Demo4;
class Teacher{
    String teacherID;
    /**
     * 关键字this
     * 关键字static
     */

    /**
     * 类属性 每个对象都可以继承()
     * 使用静态属性 static
     */
    String dep = "信息工程系";
    public static String hobby="锯木头";

    public Teacher(String teacherID){
//        当形参名称和类属性一致时 分不清 函数默认是形参名称
//        teacherID=teacherID;
        /**
         * 使用this指类本身
         * 无关键字是形参 有关键字this是类的属性
         * this也可以调用本函数内部其他属性和方法
         */
        this.teacherID=teacherID;
    }
    public  String getTeacherID(){
        return teacherID;
    }
    public  void setTeacherID(String teacherID){
//        teacherID=s;
        this.teacherID=teacherID;
    }
}
public class Demo4 {
    public static void main(String[] args) {
        Teacher t1=new Teacher("2023S2004");
        Teacher t2=new Teacher("2023S2001");
        System.out.println(t1.dep);
        System.out.println(t2.dep);
        System.out.println("************");
        t1.dep="宇宙系";
        System.out.println(t1.dep);
        System.out.println(t2.dep);
        System.out.println("静态属性");
        System.out.println(t1.hobby);
        System.out.println(t2.hobby);
        t2.hobby="摄影";
        System.out.println("************");
        System.out.println(t1.hobby);
        System.out.println(t2.hobby);
    }
}
